Hystrichosphaeridium apiculatum
From dinoflaj2
"apiculatum" Timofeev, 1959, p.52, pl.4, fig.3. Holotype: Timofeev, 1959, pl.4, fig.3. NOW Baltisphaeridium (Appendix A). Originally Hystrichosphaeridium, subsequently (and now) Baltisphaeridium (Appendix A), thirdly Goniosphaeridium (combination not validly published; Appendix A). Age: Early Ordovician.
Parent: Hystrichosphaeridium
